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Nanoscale ferroelectric and piezoelectric properties of Sb2S3 nanowire arrays
Varghese, Justin M.; Barth, Sven; Keeney, Lynette; Whatmore, Roger W.; Holmes, Justin D.
We report the first observation of piezoelectricity and ferroelectricity in individual Sb2S3 nanowires embedded in anodic alumina templates. Switching spectroscopy-piezoresponse force microscopy (SS-PFM) measurements demonstrate that individual, c-axis-oriented Sb2S3 nanowires exhibit ferroelectric as well as piezoelectric switching behavior. Sb2S3 nanowires with nominal diameters of 200 and 100 nm showed d33(eff) values around 2 pm V–1, while the piezo coefficient obtained for 50 nm diameter nanowires was relatively low at around 0.8 pm V–1. A spontaneous polarization (Ps) of approximately 1.8 μC cm–2 was observed in the 200 and 100 nm Sb2S3 nanowires, which is a 100% enhancement when compared to bulk Sb2S3 and is probably due to the defect-free, single-crystalline nature of the nanowires synthesized. The 180° ferroelectric monodomains observed in Sb2S3 nanowires were due to uniform polarization alignment along the polar c-axis.
Keyword(s): Ferroelectric; Nanowires; PFM; Piezoelectric; Sb2S3; Template; Crystallography; Ferroelectricity; Piezoelectricity; Polarization
Publication Date:
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Funder(s): Science Foundation Ireland; Higher Education Authority
Citation(s): Varghese, J., Barth, S., Keeney, L., Whatmore, R. W. and Holmes, J. D. (2012) 'Nanoscale Ferroelectric and Piezoelectric Properties of Sb2S3 Nanowire Arrays', Nano Letters, 12(2), pp. 868-872. doi: 10.1021/nl2039106
Publisher(s): American Chemical Society (ACS)
File Format(s): application/pdf
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First Indexed: 2018-09-13 06:31:00 Last Updated: 2018-09-13 06:31:00